[erlang-questions] Erlang deamon question
Anthony Molinaro
anthonym@REDACTED
Tue Mar 9 23:02:50 CET 2010
Hi Nicholas,
I used Paul's instructions here
http://dukesoferl.blogspot.com/2010/01/minor-erlang-interface-tricks.html
along with erlstart
http://code.google.com/p/erlrc/source/browse/trunk/erlstart/
to have a single beam running on a box. Then if I need to run a remote command
I can run "erlstart-eval '<erlang code>'" to eval some erlang in the running
beam, or "erlstart-remsh" to get a remote shell on the running vm.
I also use erlrc and framewerk to create rpms for all my erlang applications,
which makes deployment of applications and sub-applications easy, at it
usually just involves 'yum install <new version of some erlang application>'
and erlrc does the upgrade via the release_handler.
Anyway, you can use erlstart standalone if you just want an easy remote shell,
shell evaluator, and etop for a locally running beam.
-Anthony
On Tue, Mar 09, 2010 at 02:46:13PM -0500, Nicholas Frechette wrote:
> Hi,
> Supposed I had a single erlang application running as a deamon/service in a
> VM.
> What would be the best way to communicate with it with a command line
> application, keeping in mind I could have any number of them running at the
> same time.
> I am under the impression that I cannot reuse the built in erlang node
> communication protocol (erl -name foobar) and rpc:call mainly because I
> would have to generate random names for my client applications every time it
> is ran, and that could pollute the atom pool of the service. Note also that
> I can trust the clients and am not concerned about security here.
>
> I presume I am stuck implementing a socket based rpc module? Is there
> something already done for this in erlang? I really would love to just reuse
> erlang terms in my arguments/return values. I am unlikely to have clients in
> other languages but cross language usage could be a plus.
>
> Thoughts?
> Nicholas
--
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Anthony Molinaro <anthonym@REDACTED>
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